Correlation of Salivary Glucose level with Blood Glucose Level in Patients with Diabetes Mellitus
Diabetes Mellitus (DM) is a systemic disorder characterized by hyperglycemia either due to insulin resistance or insulin deficiency. This can lead to many serious life-threatening complications if not managed properly by regular monitoring of glycemic status. Prevalence of fear of needles in the society make people non-compliant to regular monitoring. Thus, there is a need for a non-invasive method for determining the glycemic status of the individual. Salivary Glucose has the potential to be one such tool. This study aimed to find whether a correlation between fasting blood glucose levels and fasting salivary glucose levels could be established in diabetic and non-diabetic individuals. 50 patients with DM and 50 patients without DM were studied. 5 ml of venous blood and 5 ml of unstimulated saliva after overnight fasting were collected from each participant and processed using standardized enzymatic methods. The data was analyzed using SPSS software. There was a strong and very significant positive correlation (r=0.800, p=0.001) between fasting salivary glucose levels and fasting blood glucose levels in patients with DM whereas the correlation was weak and insignificant in patients without DM (r=0.111, p=0.441). The cut off value for diagnosing DM was found to be ˃ 2.2mg/dl with 100% specificity and 100% sensitivity.